KR20220079992A - Diffusers, blowers and dust collectors - Google Patents

Abstract

In the diffuser (10) comprising a base ring member (11) and a plurality of rows of stationary blades (114), each row of stationary blades (114) is a member of the base ring member (11) along the axial direction of the base ring member (11). It is configured on the foreign exchange wall 111, is configured along the circumferential direction of the base ring member 11, and comprises an air inlet side and an air outlet side on the relative opposite sides of the base ring member 11, along the discharge side, the length of the chords of one row of stationary blades 114 is greater than or equal to the length of the chords of the next adjacent row of stationary blades 114; The fixed blades 114 have a mounting angle, and from the air inlet side to the air outlet side, the mounting angle of one row of stationary blades 114 is less than or equal to the mounting angle of the next adjacent row of stationary blades 114 . By configuring a plurality of rows of fixed blades 114 on the diffuser 10, the airflow passing through the diffuser 10 can have the effect of inducing a multistage air flow of each row of fixed blades 114, so that the multistage deceleration and pressure of the airflow can be obtained. By implementing the, it reduces the flow loss that occurs in the process of the air flow passing through the diffuser (10).

Description

Diffusers, blowers and dust collectors

The present invention relates to the technical field of cleaning equipment, and more particularly to diffusers, blowers and dust collectors.

The present invention claims the priority of the Chinese patent application for the invention with the application number CN202010010952.7 filed with the State Intellectual Property Office of China on January 06, 2020 and the invention title is "diffuser, blower and vacuum cleaner", ;

Claiming the priority of the Chinese patent application for the invention with the application number CN202010010950.8, filed with the State Intellectual Property Office of China on January 06, 2020, and the invention title is "diffuser, fan and vacuum cleaner";

Claiming the priority of the Chinese patent application for the invention with the application number CN202010011558.5 filed with the State Intellectual Property Office of China on January 06, 2020, and the invention title is "diffuser, fan and vacuum cleaner";

All contents of the above-mentioned three Chinese patent applications apply to the present invention by way of reference.

In general, dust collecting equipment includes a blower and a diffuser inside the blower to convert the kinetic energy of the airflow passing through the blower into pressure energy and reduce the flow loss of the airflow. A fixed blade is usually configured inside the diffuser to induce the inflow of airflow and to increase the pressure.

However, the conventional configuration method for the fixed blade cannot sufficiently implement the conversion between kinetic energy and pressure energy when the air flow passes through the diffuser, so the flow loss is relatively large while the air flow passes through the diffuser.

An object of the present embodiment is to provide a diffuser to solve a technical problem in which an airflow flow loss that occurs when an airflow passes through the diffuser is relatively large.

In order to achieve the above object of the present invention, the present invention adopts the following technical solutions:

In a first aspect: there is provided a diffuser comprising a base ring member and a plurality of stationary blade rows, wherein the stationary blades in each row are sequentially configured along an axial direction of the base ring member on an external wall of the base ring member , arranged along the circumferential direction of the base ring member, the base ring member constitutes an air inlet side and an outlet side, respectively, on relative opposite sides of the base ring member along the corresponding axial direction, from the inlet side to the outlet side, Among them, the length of the chord of one row of the stationary blades is greater than or equal to the length of the chords of the row next to the adjacent stationary blade;

The fixed blade has a mounting angle, from the air inlet side to the air outlet side, the mounting angle of one row of stationary blades is less than or equal to the mounting angle of the row next to the stationary blade adjacent to the stationary blades in the row.

In a second aspect: there is provided a diffuser comprising a base ring member and a plurality of stationary blades, wherein the plurality of stationary blades are sequentially arranged in a plurality of rows along an axial direction of the base ring member, and each stationary blade row includes the stationary blades. it is composed of a plurality of pieces, and in each stationary blade row, the plurality of stationary blades are configured along the circumferential direction of the base ring member, and the cross section of the base ring member has a circular shape; The profile of each stationary blade in at least one stationary blade row in the plurality of stationary blade rows is configured to be inclined toward one side of the stationary blade.

In a third aspect: there is provided a diffuser comprising a base ring member and a plurality of stationary blades, wherein the plurality of stationary blades are sequentially arranged in a plurality of rows along an axial direction of the base ring member, and in each stationary blade row, the plurality of stationary blades include: configured along a circumferential direction of the base ring member, wherein the cross section of the base ring member is circular; In the plurality of stationary blade rows, the thickness of each stationary blade in at least one stationary blade row is configured to be non-uniform from the head portion to the tail portion of the stationary blade.

In a fourth aspect: there is provided a blowing device including the diffuser.

In a fifth aspect: There is provided a dust collecting device including the blower.

This embodiment achieves at least the following advantageous effects: In the diffuser provided in this embodiment, a plurality of stationary blade rows are configured inside the diffuser along the axial direction of the base ring member, so that the airflow passing through the diffuser is each stationary. The multi-stage airflow induction action of the blade row can be obtained, and the multi-stage deceleration and pressure increase of the airflow is realized, thereby reducing the flow loss that occurs in the process of the airflow passing through the diffuser.

Since the blower provided in this embodiment includes the diffuser, it is possible to smoothly implement deceleration pressure under the premise of ensuring that a large airflow loss is not caused by the diffuser in the process of airflow passing through the diffuser. In this way, it is possible to improve the overall working efficiency of the blower and also reduce energy consumption during the operation of the blower.

The dust collecting equipment provided in this embodiment includes the blowing device, and can implement smooth deceleration and pressure increase of airflow through the blowing device, and can also implement energy saving and environmental protection during operation, including the blowing device It improves the vacuum dust collection effect of dust collecting equipment, and at the same time reduces the operating energy consumption of the dust collecting equipment.

In order to more clearly explain the technical solutions described in the embodiments of the present invention, the following embodiments or drawings necessary for the existing technical description will be briefly described, and the following drawings are specified to explain some embodiments of the present invention It is obvious that other related drawings may be derived from such drawings under the premise that creative processes are not put in by those skilled in the art to which the present invention belongs.
1 is a structural schematic diagram of a blower device according to an embodiment of the present invention;
2 is a schematic diagram of a diffuser structure of a blower according to an embodiment of the present invention;
3 is a schematic diagram of a cascade of a first row of stationary blades in a diffuser of a blower device according to an embodiment of the present invention;
Fig. 4 is a schematic diagram of a cascade of fixed blades in a first row and fixed blades in a second row in a diffuser of a blower device according to an embodiment of the present invention;
5 is a structural schematic diagram of a base ring member in a diffuser of a blower according to an embodiment of the present invention;
6 is a schematic diagram of a three-dimensional structure of a diffuser according to an embodiment of the present invention;
Fig. 7 is a schematic plan view of a cascade of the diffuser shown in Fig. 6;
Fig. 8 is a schematic diagram of the front structure of the diffuser shown in Fig. 6;
Fig. 9 is a schematic structural view of a base ring member and a second row of fixed blades in the diffuser shown in Fig. 8;
Fig. 10 is a schematic diagram of a bottom surface structure of a base ring member and a second row of fixed blades in the diffuser shown in Fig. 8;
Fig. 11 is a cross-sectional view taken along line AA shown in Fig. 8;
12 is a radial cross-sectional view of a base ring member and a row of fixed blades in a diffuser according to an embodiment of the present invention;
13 is a schematic diagram of a meridian projection of one fixed blade in a diffuser according to an embodiment of the present invention;
14 is a cross-sectional view taken along an axis through a base ring member in a diffuser according to an embodiment of the present invention;
15 is a cross-sectional view of a blowing device of a first type according to an embodiment of the present invention;
16 is a cross-sectional view of a second type of blower according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail, and the embodiments will be exemplarily shown through the drawings attached to the present invention, and the same or similar reference numerals indicate the same or similar elements or elements having the same or similar functions. Embodiments to be described below with reference to the accompanying drawings 1 to 16 of the present invention are exemplary, and are only designed to explain the present invention, and are not to be understood as limiting elements for the present invention.

In the description of the present invention, “length”, “width”, “top”, “bottom”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “ Directional indications or positional relationships such as terms such as "under", "inside", "outside", etc. are based on the direction or positional relationship shown in the drawings, and are only for convenience and simplification of the description of the present invention, and the mentioned device or element It does not necessarily indicate or imply that it has a specific orientation, or that it is configured or operated in a specific direction, so it should not be construed as a limitation on the present invention.

Also, the terms “first” and “second” are used for descriptive purposes only, and are not to be construed as indicating or implying a relative importance or implying the number of technical features indicated. Accordingly, features defined as “first” and “second” may include explicitly or implicitly one or more of such features. In the description of the present invention, "a plurality" means two or two or more, unless specifically limited.

In the embodiment of the present invention, terms such as "installation", "interconnection", "connection", "fixing", etc. should be understood in a broad sense, except for the provisions or limitations specified separately. It may be, for example, a fixed connection or a detachable connection or an integral connection; It may be a mechanical connection or an electrical connection; It may be a direct connection or an indirect connection through an intermediate intermediary, and may be an internal penetration of two configured elements or an interactive relationship between the two elements. For those of ordinary skill in the art to which the present invention pertains, specific meanings of the above terms may be understood according to specific circumstances of the present invention.

Example 1:

1, 2 and 4, the present embodiment provides a diffuser 10 for the blower 20, and the blower 20 may be used for dust collection equipment, but is limited thereto it is not Of these, as shown in FIG. 5 , the diffuser 10 includes a base ring member 11 and a few rows of stationary blades 114 , and each row of stationary blades 114 is the base ring member 11 . It is sequentially configured on the foreign exchange wall 111 of the base ring member 11 along the axial direction, and all are arranged along the circumferential direction of the base ring member 11, and the axial direction of the base ring member 11 is Comprising an air inlet side and an air outlet side, respectively, on the relative opposite sides along the side, the base ring member 11 is provided with a foreign exchange wall 111 and an inner ring wall 112, and a few mounting holes inside the inner ring wall 112 ( 113) is provided, and the base ring member 11 is configured to tightly tighten the bolt while penetrating the bolt through the mounting hole 113 and the frame 221 , to implement fixing and connection within the diffuser 10 . From the air inlet side to the air outlet side configuration, the chord length of one row of stationary blades 114 is greater than or equal to the chord length of the next row of stationary blades 114 adjacent to the row of stationary blades 114 . The fixed blade 114 has a mounting angle, and is configured from the air inlet side to the air outlet side, of which the mounting angle of one row of fixed blades 114 is adjacent to the corresponding fixed blade 114 row and the next fixed blade 114 Less than or equal to the mounting angle of the column.

First, with reference to FIG. 3, technical terms related to an embodiment of the present invention will be described as follows:

The forehead line, a line connecting the corresponding points of the heads of the fixed blades 114 in the same row is referred to as a forehead line (shown as L1 in FIG. 3 ).

The back forehead line, a line connecting the corresponding points of the tail portions of the fixed blades 114 in the same row is referred to as a back forehead line (shown as L2 in FIG. 3 ).

Entrance mounting angle: The midline and the forehead line are the narrow angles formed by the tangent to the blade head (shown as α in FIG. 3).

Exit mounting angle: is the included angle (shown as β in Fig. 3) where the midline and the posterior forehead line are tangent to the blade tail. Mounting angle: refers to the included angle between the front forehead line of the fixed blade 114 and the length of the chord, The angle changes as the length of the chord changes (shown as θ in FIG. 3).

a head portion of the fixed blade 114: a head portion (shown as a in Fig. 3) located at the forefront of the fixed blade 114 along the axial direction of the base ring member 11;

Tail portion of the fixed blade 114: along the axial direction of the base ring member 11, the tail portion (shown as b in FIG. 3) in the final position of the fixed blade 114.

Height of the fixed blade 114 : The fixed blade 114 is the length in the radial direction of the base ring member 11 .

Blade tip: A position at which the stationary blade 114 is increased to an upper portion along the radial direction is referred to as a blade tip.

Chord Length: The middle line refers to the straight distance between the head portion of the fixed blade 114 and the tail portion of the fixed blade 114 as the length of the chord (shown as L4 in FIG. 3 ).

Midline: A curve formed by connecting each midpoint in the thickness direction of the stationary blade 114 from the head portion to the tail portion of the stationary blade 114 is referred to as a midline (shown as L3 in FIG. 3 ).

In the diffuser provided in this embodiment, a plurality of stationary blades 114 rows are configured in the axial direction of the base ring member inside the diffuser, and the airflow passing through the diffuser performs the multi-stage airflow induction action of each stationary blade 114 row. This reduces the flow loss that occurs in the process of the airflow passing through the diffuser by realizing the multi-stage deceleration and pressure increase of the airflow.

The diffuser 10 provided in this embodiment will be described in more detail as follows: A plurality of fixed blades 114 rows along the axial direction of the base ring member inside the diffuser 10 provided through this embodiment By configuring, the airflow passing through the diffuser 10 can obtain a multistage airflow induction action of each fixed blade 114 row, preferentially implementing the multistage deceleration and pressure increase of the airflow. It is configured from the air inlet side to the air outlet side of the base ring member 11, of which the length of the chord of one row of fixed blades 114 is greater than the chord length of the next row of fixed blades 114 adjacent to the row of fixed blades 114 it's like In this way, each row of the stationary blades 114 can weaken the flow separation phenomenon caused by the airflow step by step, and can significantly reduce the flow loss that occurs when the airflow passes through the diffuser 10 . In this way, under the action of inducing the flow of each row of the stationary blades 114, it is possible to smoothly implement deceleration and pressure increase of the airflow on the premise that there is no large flow loss.

In this embodiment, the head portion of the fixed blade 114 has an inlet mounting angle, from the air inlet side to the air outlet side, the inlet mounting angle of one row of fixed blades 114 is the next fixed blade adjacent to the row of fixed blades 114 . (114) Less than or equal to the inlet mounting angle of the row. Among them, the exit mounting angle of one row of stationary blades 114 is less than or equal to the exit mounting angle of the next row of stationary blades 114 adjacent to the row of stationary blades 114 .

Specifically, the inlet mounting angle of one row of fixed blades 114 is configured to be less than or equal to the inlet mounting angle of the next fixed blade 114 row, and among these, the outlet mounting angle of one row of fixed blades 114 is the next fixed blade 114 ) is configured to be less than or equal to the mounting angle of the outlet of the row, more effectively suppressing the non-uniformity of the flow that occurs when the airflow flows from the previous row of the stationary blades 114 to the next row of the stationary blades 114, and also It also effectively suppresses the flow separation phenomenon that occurs when flowing from the previous row of stationary blades 114 to the next row of stationary blades 114 , and furthermore, airflow moves from the previous row of stationary blades 114 to the next row of stationary blades 114 . It also effectively reduces the flow loss that occurs when flowing to the next row of heat, improving the flow efficiency of the airflow.

In this embodiment, the tail portion of the fixed blade 114 has an outlet mounting angle, from the air inlet side to the air outlet side, the outlet mounting angle of one row of fixed blades 114 is the next fixed blade adjacent to the row of fixed blades 114 . (114) Less than or equal to the inlet mounting angle of the row. Through this, the airflow smoothly flows from the previous row of stationary blades 114 to the next row of stationary blades 114 . In this embodiment, among them, the exit mounting angle of one row of fixed blades 114 may be greater than the inlet mounting angle of the next row of fixed blades 114 adjacent to the row.

As shown in FIG. 2 in this embodiment, the diffuser 10 includes a first row of fixed blades 12 and a second row of fixed blades 13, and the first row of fixed blades 12 and the second row The fixed blade 13 is sequentially configured on the foreign exchange wall 111 of the base ring member 11 along the axial direction of the base ring member 11 from the air inlet side toward the air outlet side. Specifically, the number of rows of fixed blades 114 may be two rows, and through such a configuration, on the one hand, it is possible to ensure a sufficient number of fixed blades 114 to sufficiently induce and pressurize the airflow, and on the other hand, ensures that the number of rows of the fixed blade 114 is not excessive, and furthermore, implements a compact design of the diffuser 10 .

In this embodiment, the value of the entrance mounting angle of the stationary blades 12 in the first row is 5° to 20°, and the value of the entrance mounting angle of the stationary blades 13 in the second row is 20° to 40°. Specifically, the values of the entrance mounting angles of the fixed blades 12 of the first row are 5°, 5.5°, 6°, 6.5°, 7°, 7.5°, 8°, 8.5°, 9°, 9.5°, 10° , 10.5°, 11°, 11.5°, 12°, 12.5°, 13°, 13.5°, 14°, 14.5°, 15°, 15.5°, 16°, 16.5°, 17°, 17.5°, 18°, 18.5 °, 19°, 19.5 or 20°.

The values of the inlet mounting angles of the fixed blades 13 of the second row are 20°, 20.5°, 21°, 21.5°, 22°, 22.5°, 23°, 23.5°, 24°, 24.5°, 25°, 25.5° , 26°, 26.5°, 27°, 27.5°, 28°, 28.5°, 29°, 29.5°, 30°, 30.5°, 31°, 31.5°, 32°, 32.5°, 33°, 33.5°, 34 °, 34.5, 35°, 35.5°, 36°, 36.5°, 37°, 37.5°, 38°, 38.5°, 39°, 39.5° or 40°.

Set the value of the inlet mounting angle of the fixed blades 12 of the first row to 5° to 20°, and set the value of the inlet mounting angle of the fixed blades 13 of the second row to 20° to 40°, and go further , effectively suppressing the flow non-uniformity generated while the airflow passes through the fixed blades 12 in the first row and the fixed blades 13 in the second row, and at the same time, the fixed blades 13 in the second row effectively induce airflow guarantees

In this embodiment, the value of the outlet mounting angle of the stationary blades 12 in the first row is 10° to 60°, and the value of the inlet mounting angle of the stationary blades 13 in the second row is 60° to 80°. Specifically, the values of the outlet mounting angles of the fixed blades 12 of the first row are 10°, 15°, 20°, 25°, 30°, 35°, 40°, 45°, 50°, 55° or 60°. can be The values of the entrance mounting angles of the stationary blades 13 of the second row are 60°, 61°, 62°, 63°, 64°, 65°, 66°, 67°, 68°, 69°, 70°, 71° , 72°, 73°, 74°, 75°, 76°, 77°, 78°, 79° or 80°.

The value of the outlet mounting angle of the fixed blades 12 of the first row is set to 10° to 60°, and the value of the inlet mounting angle of the fixed blades 13 of the second row is set to 60° to 80°, so that the airflow It effectively reduces the flow separation phenomenon that occurs when flowing from the fixed blades 12 of the first row to the fixed blades 13 of the second row, further optimizes the flow state of the airflow, and furthermore, the fixed blades of the first row It reduces the flow loss that occurs when flowing from (12) to the second row of fixed blades (13), and at the same time further improves the flow efficiency of the airflow.

In this embodiment, the ratio of the length of the chords of the fixed blades 12 of the first row to the lengths of the chords of the fixed blades 13 of the second row is 1 to 5. Specifically, the ratio of the length of the chords of the fixed blades 12 of the first row to the lengths of the chords of the fixed blades 13 of the second row is 1, 1.2, 1.5, 1.7, 2, 2.2, 2.5, 2.7, 3, 3.2, 3.5 , 3.7, 4, 4.2, 4.5, 4.7 or 5. Through this, the ratio of the length of the chords of the fixed blades 12 of the first row to the lengths of the chords of the fixed blades 13 of the second row is 1 to 5. Through this, the flow separation phenomenon that occurs while the air flow flows from the fixed blades 12 of the first row to the fixed blades 13 of the second row is further reduced, and the flow loss that occurs when the air flow passes through the diffuser 10 . will progressively decrease.

In this embodiment, the number of blades of the fixed blades 12 in the first row is equal to or less than the number of blades in the fixed blades 13 in the second row, and the fixed blades 12 in the first row and the fixed blades 13 in the second row are respectively Uniformly distributed along the circumferential direction of the foreign exchange wall, the fixed blades 12 of the first row and the fixed blades 13 of the second row are displaced from each other along the axial direction of the foreign exchange wall, and the fixed blades 12 of the first row The head portion or tail portion of at least one fixed blade 114 of the first row and the head portion or tail portion of one fixed blade 114 of the second row of fixed blades 13 are aligned in the axial direction of the foreign exchange wall. In this way, the connection between the stationary blades 12 in the first row and the stationary blades 13 in the second row is stronger, so that the airflow from the stationary blades 12 in the first row to the stationary blades 13 in the second row is highly efficient. favorable to the flow.

In this embodiment, the number of blades of the fixed blades 12 of the first row is 6-20, and the number of blades of the fixed blades 13 of the second row is 10-30. Specifically, the number of blades of the fixed blades 12 in the first row is 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17 , 18, 19 or 20, the number of blades of the fixed blades 13 in the second row is 10, 11, 12, 13, 14, 15, 16, 17, 18 , 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29 or 30. The number of blades of the fixed blades 12 of the first row is set to 6-20, and the number of blades of the fixed blades 13 of the second row is set to 10-30. In this way, while the airflow flows from the stationary blades 12 in the first row to the stationary blades 13 in the second row, it receives a more sufficient airflow induction and pressure action from the stationary blades 13 in the second row, furthermore, It is possible to decrease the flow rate and increase the pressure. In this way, the pressure-increasing effect of the diffuser 10 is further improved.

In this embodiment, the fixed blades 12 of the first row and the fixed blades 13 of the second row are not in a 1:1 correspondence, nor in a strict N:1 relationship, but first, the quantity of the fixed blades 13 in the second row is After determining, positioning and matching a specific fixed blade 114 of the second row of fixed blades 13 and a specific fixed blade 114 of the first row of fixed blades 1112, the second row of fixed blades ( 13) is uniformly distributed on the foreign exchange wall of the base ring member 11 to complete the distribution for the fixed blades 13 in the second row, and then distribution to the fixed blades 12 in the first row is performed again.

In this embodiment, as shown in FIG. 4 , the spacing along the axial direction of the base ring member 11 between the head portion of the fixed blades 12 of the first row and the tail portion of the fixed blades 13 of the second row (shown as D in Fig. 2) is 3 mm or less. Specifically, the distance along the axial direction of the base ring member 11 between the head portion of the fixed blade 12 of the first row and the tail portion of the fixed blade 13 of the second row (part D shown in FIG. 2 ) is Set to 3mm or less, on the one hand, the fixed blades 12 in the first row and the fixed blades 13 in the second row realize a smooth connection to the airflow induction, ensuring the flow efficiency of the airflow, and on the other hand, the first Interference between the fixed blades 12 in the first row and the fixed blades 12 in the second row due to a machining dimensional error between the fixed blades 12 in the row and the fixed blades 12 in the second row can be avoided.

Optionally, the distance along the axial direction of the base ring member 11 between the head portion of the fixed blades 12 of the first row and the tail portion of the fixed blades 13 of the second row may be 1 mm or more and 3 mm or less. The distance along the axial direction of the base ring member 11 between the head of the fixed blade 12 in the first row and the tail of the fixed blade 13 in the second row is further limited to 1 mm or more and 3 mm or less, so that the flow of airflow To ensure the efficiency and achieve the best equilibrium by avoiding mutual interference between the fixed blades 12 in the first row and the fixed blades 13 in the second row, the fixed blades 12 in the first row and the fixed blades 13 in the second row On the premise of avoiding mutual interference, the airflow passing through the stationary blades 12 of the first row and the stationary blades 13 of the second row makes it possible to achieve the optimal airflow induction and pressure effect.

In this embodiment, the outlet mounting angle includes a first outlet mounting angle located at a blade root portion of the stationary blade 114 and a second exit mounting angle located at a blade tip region of the stationary blade 114 , the first exit mounting angle The value difference between the angle and the second outlet mounting angle is 0° to 20°.

As such, when the difference between the value of the first outlet mounting angle and the value of the second outlet mounting angle is not 0°, the contour line of the fixed blade 114 along the radial direction of the base ring member 11 is expressed as a curve, This means that the fixed blade 114 is being curved along the radial direction of the base ring member 11 . If the difference between the two angle values is 0°, it means that the fixed blade 114 extends in a straight line along the radial direction of the base ring member 11, and the value of the outlet mounting angle does not change along the radial direction.

Specifically, the difference between the value of the first outlet mounting angle and the value of the second outlet mounting angle is 0°, 1°, 2°, 3°, 4°, 5°, 6°, 7°, 8°, 9 °, 10°, 11°, 12°, 13°, 14°, 15°, 16°, 17°, 18°, 19° or 20°.

0 ° ~ By setting it to 20°, the airflow further suppresses the non-uniformity of the airflow on the tail portion of the fixed blade 114, further ensuring that the fixed blade 114 effectively induces the airflow.

In this embodiment, as shown in Fig. 2, the fixed blade 114 is an arc-shaped blade. Specifically, by setting the fixed blade 114 as an arc-shaped blade, the fixed blade 114 has a smoother and smoother induction curve, so that the airflow passes through the fixed blade 114 more smoothly and stably.

In this embodiment, as shown in FIG. 1 , the top surface of each fixed blade 114 of the diffuser 10 all comes into contact with the inner wall of the wind cover 21 . Specifically, by bringing the top surface of each fixed blade 114 into full contact with the inner wall of the wind cover 21 , each fixed blade 114 is surrounded by the base ring member 11 and the wind cover 21 . By making it sufficiently occupy, a sufficient induction effect on the airflow of the blower 20 is achieved, and furthermore, a sufficient pressure reduction deceleration on the airflow is achieved.

Based on the settings for the above-mentioned parameters, it provides multiple types of specific diffuser 10 structures, in this embodiment, the inlet mounting angle of the fixed blades 12 in the first row is 15°, and the outlet mounting angle is 24 °, the inlet mounting angle of the second row of stationary blades 13 is 35° and the outlet mounting angle is 75°. Further, the axial distance between the tail portion of the fixed blades 12 in the first row and the head portion of the fixed blades 13 in the second row is 1.8 mm, and when the diffuser 10 takes the value according to the above parameters, good aerodynamic According to the IEC60312 standard, the overall efficiency of the blower 20 having the diffuser is about 54% under the measurement condition of the 13mm perforated plate.

In this embodiment, the value of the inlet mounting angle of the fixed blades 12 in the first row is 20°, the outlet mounting angle is 27°, the value of the inlet mounting angle of the stationary blades 13 in the second row is 42°, and , the outlet mounting angle is 60°. In addition, the axial distance between the tail portion of the fixed blade 12 of the first row and the head portion of the corresponding second fixed blade 13 is 1.3 mm, and if the diffuser 10 takes the value according to the above parameter, a good It has aerodynamic performance, and according to the IEC60312 standard, the overall efficiency of the blower 20 having the diffuser is about 54.2% under the measurement condition of the 13mm perforated plate.

This embodiment also provides an air supply device 20 including the diffuser 10 described above. Specifically, the blower 20 includes a wind cover 21 , a driving mechanism 22 , a moving impeller 23 and a diffuser 10 , and the driving mechanism 22 is configured inside the wind cover 21 . and the moving impeller 23 is connected to the driving mechanism 22 and is configured to correspond to the air inlet 24 of the wind cover 21 , and the diffuser 10 is fixed inside the wind cover 21 and moves It is located on one side oriented with the air inlet 24 of the impeller 23 .

Specifically, the driving mechanism 22 includes a frame 221 , a motor 222 and a circuit board 223 , and the frame 221 and the circuit board 223 are all fixed inside the wind cover 21 , The motor 222 is configured on the frame 221 , and the driving shaft 224 of the driving motor 222 passes through the frame 221 and the diffuser 10 and is connected to the moving impeller 23 to move the impeller 23 . is driven to rotate.

Since the blower provided in this embodiment includes the diffuser, it is possible to smoothly implement deceleration pressure under the premise of ensuring that a large airflow loss is not caused by the diffuser in the process of airflow passing through the diffuser. In this way, it is possible to improve the overall working efficiency of the blower and also reduce energy consumption during the operation of the blower.

In this embodiment, there is also provided a dust collection equipment including the blower. The dust collecting equipment provided in this embodiment includes the blower, and it is possible to implement smooth deceleration and pressure increase of the airflow through the blower, and also to save energy and protect the environment during operation. It improves the vacuum dust collection effect of the dust collection equipment, and at the same time reduces the operating energy consumption of the dust collector equipment.

Example 2:

6 and 7, the diffuser 10 provided through this embodiment will be described as follows: The diffuser 10 includes a base ring member 11 and a plurality of fixed blades 114, The plurality of stationary blades 114 are divided into a plurality of rows, the rows of multiple stationary blades 114 are configured along the axial direction of the base ring member 11, and the number of stationary blades 114 in each row of stationary blades 114 is a plurality, and the plurality of stationary blades 114 in each row of stationary blades 114 are configured along the circumferential direction of the base ring member 11; A flow path 15 used to direct an airflow flow may be formed between two adjacent stationary blades 114 . When the airflow passes through the flow path 15 between the two adjacent stationary blades 114 on the peripheral side of the base ring member 11, the flow is induced by the stationary blades 114, so that the airflow flows more stably and , reduces eddy currents and reduces energy loss. The cross section of the base ring member 11 is circular, so that when the airflow flows in the axial direction of the base ring member 11 in the radial direction of the base ring member 11, the outer peripheral side angle of the base ring member 11 Since the distance to flow to the region is similar and the resistance force received is similar, the airflow can smoothly flow toward the outer periphery of the base ring member 11 , thereby reducing energy loss. A plurality of fixed blades 114 are configured in a plurality of rows along the axial direction of the base ring member 11, and the flow of airflow can be gradually induced through such a plurality of rows of fixed blades 114, thereby reducing energy loss. , can improve the compression effect.

For convenience of description, when the airflow passes through the diffuser 10 , the inlet direction of the airflow is set to up, front, or head, and the outlet direction of the airflow is defined as down, back, or tail.

For convenience of description, the plurality of fixed blades 114 are divided into two rows along the axial direction of the base ring member 11 and sequentially defined as the first row of fixed blades 12 and the second row of fixed blades from top to bottom. do. That is, the blades 12 of the first row are the previous row of the stationary blades 13 of the second row, and the stationary blades 13 of the second row are the rows following the stationary blades 12 of the first row. The plurality of fixed blades 114 are divided into three rows along the axial direction of the base ring member 11, and sequentially from top to bottom, the first row of fixed blades 12, the second row of fixed blades, and the third row of fixed blades (114). The plurality of fixed blades 114 are divided into four or more rows along the axial direction of the base ring member 11, and sequentially from top to bottom, the first row of fixed blades 12, the second row of fixed blades 13, the third A row of fixed blades 114 ... etc. are arranged. That is, if the plurality of fixed blades 114 are configured in N (N is a positive integer, N≥22) column along the axial direction of the base ring member 11, the first column, the second column from top to bottom. .... is partitioned into the Nth column; Among them, the fixed blade 114 of the M-1th row is the previous fixed blade 114 row of the fixed blade 114 of the Mth row, and the fixed blade 114 of the Mth row is the fixed blade 114 of the M-1st row ) is the next stationary blade 114 row (M is a positive integer, M≤N).

11 , the profile 18 of the stationary blade 114 refers to the two sides between the blade root 17 and the blade tip 16 of the stationary blade 114 ; The two sides between the blade root 17 and the blade tip 16 of the stationary blade 114 are the suction surface 19 and the pressure surface 14, respectively, and the suction surface 19 and the pressure surface 14 collectively referred to as profile 18; The blade root 17 of the fixed blade 114 refers to a root portion where the height of the fixed blade 114 is close to the base ring member 11; The blade tip 16 of the fixed blade 114 refers to the normal portion where the fixed blade 114 height is far from the base ring member 11; The head portion of the fixed blade 114 refers to a position at the front end portion of the fixed blade 114 along the airflow flow direction, that is, a portion on the fixed blade 114 that starts to contact the airflow; The tail portion of the fixed blade 114 refers to a location on the rear end of the fixed blade 114 along the airflow flow direction, that is, a portion on the corresponding fixed blade 114 when the airflow leaves the fixed blade 114 .

6 , in the first row of fixed blades 12: the two sides of each fixed blade 114 are a suction surface 19a and a pressure surface 14a, respectively, and an absorption surface 19a and a pressure surface ( 14a) is collectively referred to as the profile 18a of the corresponding fixed blade 114; A flow path 15a for inducing an airflow flow may be formed between the two fixed blades 114 adjacent to each other. In the second row of stationary blades 13: the two sides of each stationary blade 114 are respectively a suction side 19b and a pressure side 14b, and the suction side 19b and the pressure side 14b are connected to the corresponding stationary blades. collectively referred to as profile 18b of (114); A flow path 15b for inducing an airflow flow may be formed between the two fixed blades 114 adjacent to each other.

In this embodiment, referring to FIG. 6 , the plurality of fixed blades 114 are divided into two rows along the axial direction of the base ring member 11 , and sequentially from top to bottom, the first row of fixed blades 12 and the second arranged in a row of fixed blades 13 , that is, the fixed blades 12 of the first row are the previous row of the fixed blades 13 of the second row, and the fixed blades 13 of the second row are the fixed blades 12 of the first row ) in the next column. In some embodiments, the plurality of stationary blades 114 are divided into three, four, or more rows along the axial direction of the base ring member 11 .

Referring to FIG. 7 in this embodiment, the fixed blade 114 has the same thickness in the middle portion in the height direction and takes a curved surface having the same shape as the base ring member 11, and the curved surface has a cylindrical shape. , the curved surface is coaxial with the base ring member 11 , and the curved surface is developed on a plane to obtain a planar cascade view of each fixed blade 114 . In the plan cascade drawing, the connecting line of the corresponding point of the head of each fixed blade 114 in each fixed blade 114 column is referred to as the forehead line L1 of the corresponding fixed blade 114 column, and at the same time, the front forehead line L1 is the corresponding a tangent to the corresponding point of the head of each stationary blade 114 in the row of stationary blades 114; In each fixed blade 114 row, the connecting line of the corresponding point of the tail of each fixed blade 114 is referred to as the rear forehead line L2 of the corresponding fixed blade 114 row, and at the same time, the rear forehead line L2 is the corresponding fixed blade ( 114) is the tangent to the corresponding point of the tail of each fixed blade 114 in the row; A curve obtained by connecting the midpoints of the thickness H of each fixed blade 114 is referred to as the midline L3 of the corresponding fixed blade 114; The included angle between the tangent on the head of the fixed blade 114 to which the intermediate line L3 corresponds and the tangent to the corresponding point of the head of the fixed blade 114 is the entrance mounting angle α, that is, the intermediate line L3 is fixed The included angle between the tangent on the blade 114 head and the corresponding forehead line L1 is the entrance mounting angle α; The angle between the midline L3 tangent on the fixed blade 114 tail and the corresponding tangent on the fixed blade 114 tail is the outlet mounting angle β, i.e. the midline L3 is the fixed blade (114) the angle of entry between the tangent on the tail and the corresponding occipital line L2 is the exit mounting angle β; The middle line L3 is the distance between the head and the tail of the fixed blade 114 is the length L4 of the chord, and the straight line distance between the different positions on the middle line L3 and the head of the fixed blade 114 is is the length of the location chord (L5), that is, the linear distance between each point on the midline (L3) and the head of the fixed blade 114 is the length of the location chord (L5) of that point; The length L5 of the positioning chord on a specific position of the fixed blade 114 has a mounting angle θ, and the mounting angle θ of the length L5 of the positioning chord is the position and the corresponding fixed blade 114 head portion It is the included angle between the line segment between equal height positions and the corresponding forehead line L1.

Taking the fixed blades 12 of the first row as an example: in the fixed blades 12 of the first row, the connecting line of the corresponding points of the heads of each fixed blade 114 is the forehead line L1a of the fixed blades 12 of the first row, and at the same time , the corresponding forehead line L1a is a tangent to the corresponding point of the head portion of each fixed blade 114 in the fixed blade 12 in the first row; In the fixed blade 12 of the first row, the connecting line of the corresponding point of the tail of each fixed blade 114 is the rear forehead line L2a of the fixed blade 12 of the first row, and at the same time, the corresponding rear forehead line L2a is the first a tangent to the corresponding point of the tail of each stationary blade 114 on the stationary blades 12 of the row; A curve obtained by connecting the midpoints of the thickness Ha of each stationary blade 114 on the stationary blade 12 of the first row is referred to as the midline L3a of the stationary blade 114; The midline L3a of each stationary blade 114 in the stationary blade 12 of the first row is the included angle between the tangent on the head of the stationary blade 114 and the tangent of the corresponding point of the head of the stationary blade 114 is the inlet is the mounting angle (αa); The midline L3a of each fixed blade 114 in the first row of fixed blades 12 is the included angle between the tangent on the tail of the fixed blade 114 and the tangent of the corresponding point of the tail of the fixed blade 114 exit mounting angle βa; The midline L3a of each fixed blade 114 in the first row of fixed blades 12 indicates that the distance between the head and the tail of the fixed blade 114 is the length of the chord of the fixed blade 114 ( La), and the linear distance between a specific point on the midline L3a of each fixed blade 114 in the first row of fixed blades 12 and the head of the fixed blade 114 is is the length (L5a) of the location chord of the corresponding point; The length L5a of the positioning chord on a particular position of each stationary blade 114 in the first row of stationary blades 12 has a mounting angle θa, and the mounting angle θa of the length L5a of the positioning chord is It is the included angle between the line segment between the corresponding position and the same height part of the head of the fixed blade 114 and the corresponding frontal line L1a.

Taking the stationary blades 13 of the second row as an example: in the stationary blades 13 of the second row, the connecting line of the corresponding points of the heads of each stationary blade 114 is the forehead line L1b of the stationary blades 13 of the second row, and at the same time , the corresponding forehead line L1b is a tangent to the corresponding point of the head of each fixed blade 114 in the second row of fixed blades 13; In the fixed blade 13 of the second row, the connecting line of the corresponding point of the tail of each fixed blade 114 is the rear forehead line L2b of the fixed blade 13 of the second row, and at the same time, the corresponding rear forehead line L2b is the second a tangent to the corresponding point of the tail of each stationary blade 114 on the stationary blades 13 of the row; A curve obtained by connecting the midpoints of the thickness Hb of each stationary blade 114 on the stationary blades 13 of the second row is referred to as the midline L3b of the stationary blades 114; The midline L3b of each stationary blade 114 in the second row of stationary blades 13 is the included angle between the tangent line on the head of the stationary blade 114 and the tangent of the corresponding point of the head of the stationary blade 114 is the inlet is the mounting angle (αb); The midline L3b of each fixed blade 114 in the second row of fixed blades 13 is the included angle between the tangent on the tail of the fixed blade 114 and the tangent of the corresponding point of the tail of the fixed blade 114 exit mounting angle (βb); The midline L3b of each stationary blade 114 in the second row of stationary blades 13 indicates that the distance between the head and tail of the stationary blade 114 is the length of the chord of the stationary blade 114 ( Lb), and the linear distance between a specific point on the midline L3b of each fixed blade 114 in the second row of fixed blades 13 and the head of the fixed blade 114 is is the length (L5b) of the location chord of the corresponding point; The length L5b of the positioning chord on a specific position of each stationary blade 114 in the second row of stationary blades 13 has a mounting angle θb, and the mounting angle θb of the length L5b of the positioning chord is It is the included angle between the line segment between the corresponding position and the same height portion of the head of the fixed blade 114 and the corresponding front forehead line L1b.

In this embodiment, referring to FIGS. 6 and 7 , in the plurality of rows of fixed blades 114, the thickness H of each fixed blade 114 among the fixed blades 114 of at least one row is the corresponding fixed blade ( 114) It is configured non-uniformly from the head part to the tail part, so that the flow separation when the air flow flows into the flow path 15 between the two fixed blades 114 adjacent to each other among the fixed blades 114 is improved, and the flow separation is improved. can reduce losses; When the airflow passes through the flow path 15 between the stationary blades 114 in the row of the stationary blades 114, the vortex can be improved, and the flow separation of the blade root 17 region can be controlled and controlled; It is possible to reduce the airflow non-uniformity when the airflow flows out from the flow path 15 between the stationary blades 114 in the row of the stationary blades 114, improve the pressing effect, and at the same time reduce the airflow flow noise.

In the diffuser 10 of this embodiment, a plurality of rows of fixed blades 114 are configured on the outer periphery of the base ring member 11, and the absolute speed of the airflow is reduced by gradually inducing airflow through the plurality of fixed blades 114 and improves the pressure-increasing effect; The thickness H of each stationary blade 114 in at least one row of stationary blades 114 is configured to be non-uniform from the head portion of the stationary blade 114 to the tail portion, so that the airflow is not constant among the stationary blades 114. improve the flow separation upon inflow into the flow path 15 between the two fixed blades 114 adjacent to each other, and reduce the flow separation loss; When the airflow passes through the flow path 15 between the stationary blades 114 in the row of the stationary blades 114, the vortex can be improved, and the flow separation of the blade root 17 region can be controlled and controlled; It is possible to reduce the airflow non-uniformity when the airflow flows out from the flow path 15 between the stationary blades 114 in the row of the stationary blades 114, improve the pressing effect, and at the same time reduce the airflow flow noise.

In this embodiment, the longitudinal direction of each fixed blade 114 is inclined in the axial direction of the base ring member 11 , and the longitudinal direction of each fixed blade 114 connects the head and the tail of the corresponding fixed blade 114 . It means a direction formed by, and when the airflow passes through the flow path 15 between the two fixed blades 114, it induces a gradual change in the direction of the airflow to reduce the energy loss of the airflow.

In the present embodiment, when the diffuser 10 includes a plurality of rows of stationary blades 114 , the thickness H of each stationary blade 114 in one row of stationary blades 114 is the head of the stationary blade 114 . It may be configured non-uniformly from the part to the tail part. Of course, the thickness H of each fixed blade 114 in several rows of fixed blades 114 among them may be configured to be non-constant from the head portion to the tail portion of the fixed blade 114 . In addition, the thickness H of each fixed blade 114 in each fixed blade 114 may be configured to be non-constant from the head portion to the tail portion of the fixed blade 114 .

In each fixed blade 114 in which the thickness H is set to be non-uniform in this embodiment, the thickness H of each fixed blade 114 gradually increases from the head portion to the tail portion of the fixed blade 114, and then gradually increases again. When the airflow passes through the flow path 15 between the fixed blades 114, first, the circumferential velocity and the absolute velocity of the airflow are gradually reduced to reduce the movement separation loss, and then the vortex is improved so that the airflow is fixed. It reduces the non-uniformity when flowing out of the flow path 15 between the blades 114, reduces the flow separation loss, improves the pressurization effect, and reduces the flow noise of the air stream.

In this embodiment, with reference to FIGS. 6 and 7 , in each fixed blade 114 in which the thickness H is set to be non-uniform: each fixed blade 114 at the position of the portion where the thickness H is the largest. The length L5 corresponds to 30% to 45% of the length L of the chord of the fixed blade 114, that is, the thickness H corresponding to each point on the midline of each fixed blade 114. In this case, the length of the chord (L5) of the point on the corresponding midline of the region of the maximum thickness (H) corresponds to 30% to 45% of the length (L) of the chord of the corresponding fixed blade 114; The airflow first reduces the circumferential velocity and the absolute velocity of the airflow in the fixed blade 114, and then gradually induces the airflow to improve the flow uniformity of the airflow, reduce the flow separation loss of the airflow, and increase the pressure effect It improves and reduces the flow noise of the air current.

Taking the first row of fixed blades 12 as an example: when the thickness Ha of each fixed blade 114 in the first fixed blade 12 is set to be non-permanently invariant, In each position on the midline of each fixed blade 114 in the corresponding thickness Ha, the chord length L5a of the point corresponding to the maximum thickness Ha is the chord length of the corresponding fixed blade 114. It corresponds to 30% to 45% of (La).

Taking the second row of fixed blades 13 as an example: when the thickness Hb of each fixed blade 114 of the second row of fixed blades 13 is set to be non-constant, each In the thickness Hb corresponding to each position on the midline of the fixed blade 114, the length of the chord L5b at the point corresponding to the maximum thickness Hb is the length of the chord Lb of the fixed blade 114. It is equivalent to 30% to 45% of

In this embodiment, with reference to FIGS. 6 and 7 , in each fixed blade 114 set to not match the thickness H, each fixed blade 114 thickness H is the largest position of the chord. The length L5 corresponds to 35% to 45% of the length L of the chord of the corresponding fixed blade 114, that is, the thickness H corresponding to each point on the midline of each fixed blade 114. In this case, the length of the chord (L5) of the position of the point on the corresponding midline of the region of the maximum thickness (H) corresponds to 35% to 45% of the length (L) of the chord of the corresponding fixed blade 114, the flow of the airflow It reduces the separation loss, improves the vortex, improves the pressurization effect, and reduces the flow noise of the air current.

6 and 7, in the second row of fixed blades 13, the thickness Hb of each fixed blade 114 satisfies the following relationship, that is, the second row of fixed blades In (13), the thickness Hb corresponding to each point on the midline of each stationary blade 114 satisfies the following relationship:

The thickness range of each fixed blade 114 head portion is 0.1-0.8mm;

The thickness (Hb) range of each stationary blade 114 location where the chord length (L5b) is 40% of the chord length (Lb) of the corresponding stationary blade 114 is 1.1-1.4 mm;

The thickness range of the tail portion of each fixed blade 114 is 0.1-1mm.

This can better reduce the flow separation loss, improve the vortex, improve the pressurization effect, and reduce the airflow flow noise.

6 and 7, in the second row of fixed blades 13, the thickness Hb of each fixed blade 114 satisfies the following relationship, that is, the second row of fixed blades In (13), the thickness Hb corresponding to each point on the midline of each stationary blade 114 satisfies the following relationship:

The thickness range of each fixed blade 114 head portion is 0.1-0.8mm;

The thickness (Hb) range of each stationary blade 114 location where the chord length (L5b) is 30% of the length (Lb) of the corresponding stationary blade 114 chord is 1-1.3 mm;

The thickness (Hb) range of each stationary blade 114 location where the chord length (L5b) is 40% of the chord length (Lb) of the corresponding stationary blade 114 is 1.1-1.4mm;

The thickness (Hb) range of each stationary blade 114 location where the chord length (L5b) is 50% of the chord length (Lb) of the corresponding stationary blade 114 is 1-1.3 mm;

The thickness (Hb) range of each stationary blade 114 location where the chord length (L5b) is 60% of the chord length (Lb) of the corresponding stationary blade 114 is 0.9-1.2 mm;

The thickness (Hb) range of each fixed blade 114 location where the chord length (L5b) is 70% of the chord length (Lb) of the corresponding fixed blade 114 is 0.8-1.1 mm;

The thickness range of the tail portion of each fixed blade 114 is 0.1-1mm.

Through this, it is possible to better determine the thickness of each part of the fixed blade 114, furthermore, to reduce the flow separation loss, to improve the vortex, to improve the pressing effect, and to reduce the airflow flow noise.

In this embodiment, referring to FIGS. 6 and 7 , in the second row of fixed blades 13 , the thickness Hb corresponding to each point on the midline of each fixed blade 114 satisfies the following formula do:

T2≤Hb≤T1;

T1=0.82+0.68L1b-0.17L1b ² +0.011L1b ³ ;

T2=0.68L1b-0.17L1b ² +0.011L1b ³ ;

Here, L1b is the distance from the corresponding point on the midline of the stationary blade 114 to the head of the stationary blade 114, that is, L1b is the length of the chord of the location of the corresponding point on the midline of the stationary blade 114, L1b ² is the square of L1b, L1b ³ is the cube of L1b, 0.68L1b is 0.68 times L1b, 0.17L1b ² is 0.17 times L1b ² , 0.011L1b ³ is 0.011 times L1b ³ , T1 is the fixed blade 114 is the maximum thickness relational expression of the corresponding point portion on the midline of , and T2 represents the minimum thickness relational expression of the corresponding point portion on the midline of the fixed blade 114 .

Through the above formula, through the thickness Hb corresponding to each point on the midline of each fixed blade 114 in the second row of fixed blades 13, it is possible to better reduce the flow loss, and It can improve the non-uniformity and vortex, improve the pressing effect, and reduce the flow noise of the air current.

In this embodiment, referring to FIG. 7 , the thickness Hb corresponding to each point on the midline of each stationary blade 114 satisfies the following formula: Hb=0.32+0.68L1b-0.17L1b ² +0.011 L1b ³ . Here, L1b is the distance from the corresponding point on the midline of the stationary blade 114 to the head of the stationary blade 114, that is, L1b is the length of the chord of the location of the corresponding point on the midline of the stationary blade 114, L1b ² is the square of L1b, L1b ³ is the cube of L1b, 0.68L1b is 0.68 times L1b, 0.17L1b ² is 0.17 times L1b ² , 0.011L1b ³ is 0.011 times L1b ³ . Through this, the thickness of each fixed blade 114 in the second row of fixed blades 13 is better determined, the flow loss is further reduced, the non-uniformity and vortex of the air flow is improved, the pressing effect is improved, Reduces airflow noise.

In this embodiment, referring to FIGS. 6 and 8 together, the outer diameter range of the base ring member 11 is 35-80 mm. Accordingly, the thickness H of the fixed blade 114 is more fully matched with the base ring 11, ensuring the size of the flow path 15 between the adjacent fixed blades 114, and resistance to airflow. Energy loss is reduced, and the compression effect is improved.

In this embodiment, referring to FIG. 12 , in each fixed blade 114 in which the thickness H is set to be non-uniform, the blade root 17 corresponding to an arbitrary position on the midline of each fixed blade 114 . ) is H1, the thickness of the blade tip 16 at that location is H2, H1≥H2, that is, the thickness H1 of the blade root 17 at any position on the midline of each fixed blade 114 ) is set to be greater than or equal to the thickness (H2) of the blade tip 16 at the location, to more fully control the flow separation near the blade root 17 and reduce the flow separation loss, and the is improved

In this embodiment, with reference to FIG. 12 , in each fixed blade 114 in which the thickness H is set to be non-uniform, 0≤H1-H2≤0.5mm; That is, since the blade root 17 at an arbitrary position of each fixed blade 114 is set to have a thickness difference of 0.5 mm or less compared to the blade tip 16, processing is convenient, and each part of each fixed blade 114 is While guaranteeing the strength of the blade tip 16 of

In this embodiment, referring to FIG. 12 , in each fixed blade 114 having a non-uniform thickness H, the thickness H of each part on the midline of each fixed blade 114 is determined by the fixed blade ( 114) is set to gradually increase from the blade root 17 to the blade tip 16, to more fully control the flow separation in the vicinity of the fixed blade root 17, reduce the flow separation loss, and increase the pressure effect is improved

When the diffuser 10 is used, the airflow flows at high speed radially and circumferentially from the outlet of the moving impeller, and enters the diffuser 10 by turning axially at an extremely short distance of the wind cover, so that the moving impeller outlet flow Separation becomes severe.

In this embodiment, the mounting angle θ of each fixed blade 114 is set to gradually increase from the head portion to the tail portion of the fixed blade 114, thereby gradually decreasing the circumferential speed and absolute speed of the airflow, Improves the effect of decelerating pressure increase, and at the same time cooperates with the inclined profile surface 18 of the static blade 114, further reduces the vortex of the flow path 15, reduces energy loss, and improves the pressure increase effect do.

In this embodiment, the change in the mounting angle θ of the length L5 of the chord at different positions of the fixed blade 114 is as follows: The mounting angle θ of each portion of the front part of the fixed blade 114 is basically Equal to the inlet mounting angle α, the area of the flow passage 15 between the front fixed blades 114 is uniformly increased, so as to achieve the effect of uniformly reducing and increasing the pressure of the absolute velocity of the air flow. The rear end mounting angle θ of the fixed blade 114 increases from the inlet mounting angle α to the outlet mounting angle β to reduce the circumferential and absolute velocity of the airflow, further improving the deceleration and supercharging effect .

In this embodiment, referring to FIG. 7 , in the fixed blades 12 of the first row: the mounting angle αa of the entrance of each fixed blade 114 ranges from 5 degrees to 10 degrees. The inlet mounting angle αa of each stationary blade 114 ranges from 5 degrees to 10 degrees, which more fully matches the airflow to have a high circumferential velocity at the entrance of the stationary blade 114, so that the absolute speed of the airflow can be uniformly reduced and the pressure-increasing effect can be improved.

In this embodiment, referring to FIG. 7 , in the stationary blades 13 of the second row, the inlet mounting angle αb of each stationary blade 114 ranges from 20 degrees to 60 degrees. The inlet mounting angle αb of each fixed blade 114 is set to 20 to 60 degrees, so that the inlet of the fixed blade 114 has an airflow of a high circumferential velocity, and more sufficiently matched, so that the absolute speed of the airflow is uniformly can be reduced and the pressure-increasing effect can be improved.

In this embodiment, in the fixed blades 12 of the first row, the mounting angle αa of the entrance of each fixed blade 114 ranges from 5 degrees to 10 degrees. In the second row of stationary blades 13 , the inlet mounting angle αb of each stationary blade 114 ranges from 20 degrees to 60 degrees. By allowing the airflow to flow from the stationary blades 12 in the first row to the stationary blades 13 in the second row, the circumferential velocity and the absolute velocity can be gradually reduced, and the non-uniformity of the airflow in the tail of the stationary blades 12 in the first row It can reduce the flow rate, further reduce the flow loss, and improve the pressure-increasing effect.

In the present embodiment, in the fixed blades 12 of the first row, the outlet mounting angle βa of each fixed blade 114 ranges from 10 degrees to 20 degrees, and as the air flow flows out from the fixed blade 114 tail , because the airflow angle distribution is more non-uniform, the outlet mounting angle βa range is set to 10 to 20 degrees, further suppressing the non-uniformity of the fixed blade 114 tail outlet flow, reducing energy loss, and decelerating And it can improve the pressure-increasing effect.

In this embodiment, for the fixed blades 12 in the first row: the mounting angle αa of the entrance of each fixed blade 114 ranges from 10 degrees to 20 degrees. In the second row of stationary blades 13 , the inlet mounting angle αb of each stationary blade 114 ranges from 20 degrees to 60 degrees. As the airflow flows from the stationary blades 12 of the first row to the stationary blades 13 of the second row, the circumferential velocity and the absolute velocity may gradually decrease, and the flow loss in the airflow flow process is gently reduced, and the pressure-increasing effect is improved. can be improved

In this embodiment, in the fixed blades 13 of the second row, the outlet mounting angle βb of each fixed blade 114 is in the range of 50 degrees to 90 degrees, and the air flow is When the airflow angle distribution becomes more non-uniform, by setting the range of the outlet mounting angle βb to 50 to 90 degrees, it is possible to further suppress the non-uniformity of the outlet flow of the fixed blade 114 tail, thereby reducing energy loss. reduce and the deceleration and pressure increase effect can be improved.

In this embodiment, in the fixed blades 12 of the first row, the mounting angle αa of the entrance of each fixed blade 114 ranges from 10 degrees to 20 degrees. In the second row of stationary blades 13 , the inlet mounting angle αb of each stationary blade 114 ranges from 50 degrees to 90 degrees. The airflow passes from the first row of stationary blades 12 through the second row of stationary blades 13, so that the circumferential and absolute velocity can be gradually reduced, reducing the airflow non-uniformity of the tail portion of the first row of stationary blades 12 and the pressure-increasing effect can be improved.

In this embodiment, in the second row of fixed blades 13 , the outlet mounting angle βb of each fixed blade 114 is 60 degrees to 90 degrees, and the inlet mounting angle ka of each fixed blade 114 is By setting the range to 25 to 50 degrees, the non-uniformity of the outlet flow of the tail part of the fixed blade 114 can be more fully suppressed, thereby reducing energy loss and improving the deceleration and pressure boosting effects.

In the present embodiment, the change width of the inlet mounting angle α of each fixed blade 114 along the radial direction of the base ring member 11 is 10 degrees or less, that is, the inlet mounting angle α of each fixed blade 114 . ) The change width from the blade root 17 to the blade tip 16 is 10 degrees or less, and the inlet mounting angle α of the blade root 17 portion of each fixed blade 114 is the fixed blade 114 blade By setting it to be greater than or equal to the inlet mounting angle α of the tip 16, on the one hand, it is convenient to manufacture, and on the other hand, the flow separation loss can be reduced and the diffusion effect can be improved.

In this embodiment, referring to FIGS. 6 and 8 , in two rows of fixed blades 114 adjacent to each other, the number of fixed blades 114 in one row of the next fixed blades 114 is the number of fixed blades 114 in the previous fixed blades 114 . It is equivalent to 1.5 to 3 times the number of fixed blades 114 in one row. The number of stationary blades 114 in one row of the previous stationary blade 114 is set to be relatively small, and the number of stationary blades 114 in one row of the next stationary blade 114 is set to be higher, so that the airflow sequentially increases each When passing through the fixed blade 114 row, it is possible to gradually strengthen the airflow induction, and achieve the effect of improving the airflow deceleration and pressure increase.

In this embodiment, referring to FIGS. 6 and 8 , in two rows of fixed blades 114 adjacent to each other, the tail of each fixed blade 114 in one row of the previous fixed blade 114 is the base ring member 11 ), the angle relative to the head away from the corresponding next stationary blade 114 row that is nearby along the circumferential direction is less than or equal to 20 degrees. That is, a plane passing through the axis of the base ring member 11 and the tail portion blade root 17 of each stationary blade 114 in one row of the previous stationary blades 114, and the head in one row of the next stationary blades 114 In the plane passing through the axis of the minor blade root 17 and the base ring member 11, the included angle between the two planes is set to 20 degrees or less, reducing the non-uniformity of the airflow, reducing the flow separation loss and Enhance the pressure-increasing effect.

In this embodiment, referring to FIG. 14 , in two rows of stationary blades 114 adjacent to each other, the tail of each stationary blade 114 in one row of the previous stationary blade 114 is the corresponding next stationary blade in the vicinity. (114) It is configured to match the head of the column, reducing the non-uniformity of the airflow, reducing the flow separation loss and improving the pressure-increasing effect.

9, 10 and 11 in this embodiment, the inclination angle Q of the profile 18 of the specific point on the stationary blade 114 is a base ring passing through the corresponding point on the stationary blade 114. In the radial plane of the member 11 , between the line segment where the profile 18 of the stationary blade 114 and the corresponding radial plane intersect and the radial line passing through the corresponding point on the stationary blade 114 . refers to the narrow angle.

In the present embodiment, the radial face of the base ring member 11 refers to a plane perpendicular to the axial direction of the base ring member 11 , and the radial line is a radial line of the base ring member 11 . The radial line of the base ring member 11 means a straight line extending in the radial direction of the base ring member 11, and the radial line passing through the corresponding point on the fixed blade 114 is the base ring member It means a straight line extending along the radial direction of (11) and passing through the point.

In this embodiment, for each fixed blade 114 in which the profile 18 is configured to be inclined, the inclination angle of the head portion profile 18 of each fixed blade 114 is equal to the head portion profile 18 of the corresponding fixed blade 114 . greater than or equal to the angle of inclination of The inclination angle of the tail portion profile 18 of each fixed blade 114 is set to be greater than or equal to the inclination angle of the head portion profile 18, so that when the air flow passes through the flow path 15 between the fixed blades 114, the fixed blades 114 gradually strengthens the induction and control of the airflow, improves the vortex of the flow path 15, reduces the separation loss, and furthermore, reduces the energy loss and noise of the airflow.

In the present embodiment, for each fixed blade 114 in which the profile 18 is configured to be inclined, the inclination angle of the profile 18 of each fixed blade 114 is gradually increased from the head portion to the tail portion of the fixed blade 114 . It is set to increase, and when the airflow passes through the flow path 15 between the corresponding fixed blades 114, it is possible to gradually adjust the airflow, thereby improving the separation loss of the airflow, and reducing energy loss and noise.

In this embodiment, with reference to FIGS. 9 and 10 , in the second row of fixed blades 13 , the inclination angle of the head portion profile 18b of each fixed blade 114 is Q1, and each fixed blade 114 is The inclination angle of the tail portion profile 18b of is Q2, and satisfies Q2≥Q1. The inclination angle Q1 of the tail section profile 18b of each stationary blade 114 in the second row of stationary blades 13 is set to be equal to or greater than the inclination angle Q1 of the head section profile 18b, so that the airflow is directed to the stationary blades ( When passing through the flow path 15b between 114), the fixed blade 114 gradually strengthens the induction and control of the airflow, improving the vortex of the flow path 15b, reducing the separation loss, and further, Energy loss and noise in the airflow are reduced.

In this embodiment, referring to FIGS. 9 and 10 , for the stationary blades 13 in the second row, the value of Q1 ranges from 0 degrees to 30 degrees, that is, the head portion profile of each stationary blade 114 ( When the inclination angle Q1 of 18b) is 30 degrees or less, when the airflow flows into the flow path 15b between the fixed blades 114, a relatively large energy loss due to excessive corner angle adjustment of the airflow can be avoided. The value range of Q2 is 0 degrees to 40 degrees, that is, by configuring the inclination angle Q2 of the head portion profile 18b of each fixed blade 114 to be 40 degrees or less, the air flow flows through the flow path between the fixed blades 114 . When passing (15b), a relatively large energy loss due to excessive airflow control can be avoided.

In this embodiment, referring to FIGS. 9 and 10 , in the stationary blades 13 in the second row, the value range of Q1 is set to 12 degrees to 18 degrees, so that the airflow flows through the flow paths 15b between the stationary blades 114 . ), it is possible to more sufficiently reduce the flow separation loss and noise. The value range of Q2 is 20 degrees to 35 degrees, satisfying Q2 ≥ Q1. When the airflow passes through the flow path 15b between the stationary blades 114, the flow separation loss is more sufficiently reduced, the energy loss is reduced, and the flow noise of the airflow is reduced.

In this embodiment, for the stationary blades 13 of the second row, the value range of Q1 is set from 0 degrees to 30 degrees, so that when the airflow enters the flow path 15b between the stationary blades 114, excessive A relatively large energy loss due to corner angle adjustment can be avoided. The value range of Q2 is 15 degrees to 40 degrees, and when the air flow passes through the flow path 15b between the fixed blades 114, a relatively large energy loss due to excessive control of the air flow can be avoided.

In this embodiment, referring to FIG. 9 , a plane corresponding to the axis of the blade root 17 and the base ring member 11 of the head of each fixed blade 114, and the corresponding fixed blade 114, the tail of the blade root 17 ) and the included angle between the corresponding plane of the axis of the base ring member 11 is the lap angle P of the corresponding stationary blade 114 .

In this embodiment, referring to FIG. 9 , in two rows of fixed blades 114 adjacent to each other, the lap angle of each stationary blade 114 in one row of the previous stationary blade 114 is one of the next stationary blades 114 . greater than or equal to the wrap angle of each stationary blade 114 in the row. Setting the wrap angle of each stationary blade 114 in one row of the previous stationary blades 114 to be large can gradually better guide the airflow, reduce the separation loss, and improve the pressing effect.

In this embodiment, referring to FIG. 7 , in two rows of fixed blades 114 adjacent to each other, the length La of the chords of each fixed blade 114 in one row of the previous fixed blade 114 is the next fixed blade. (114) greater than or equal to the length (Lb) of the chords of each stationary blade 114 in a row; When the airflow enters the diffuser 10, it has a relatively large circumferential velocity, so that when the airflow passes through each stationary blade 114, the length of the chord of each stationary blade 114 in one row of the previous stationary blade 114 is By setting it relatively long, the airflow can be more sufficiently induced, the circumferential speed of the airflow can be reduced, and the separation loss can be reduced by gradually guiding it through the fixed blades 114 of each row.

In this embodiment, referring to FIG. 13 , a plane passing through the axial direction of the base ring member 11 is the meridian of the corresponding diffuser 10 , and each fixed blade 114 is in the circumferential direction of the base ring member 11 . It is projected on the meridian surface along, and becomes the meridian projection surface of the fixed blade 114 . The tip line 214 of each fixed blade 114 is a line segment obtained by projecting the head of the fixed blade 114 onto the meridian surface. The trailing end line 215 of each fixed blade 114 is a line segment obtained by projecting the tail of the fixed blade 114 onto the meridian surface. The intersection line of the radial surface of the base ring member 11 and the meridian projection surface is a line segment perpendicular to the axial direction of the base ring member 11 .

In the present embodiment, in at least one row of stationary blades 114 , the leading edge 214 of each stationary blade 114 is configured to be inclined with respect to the radial face of the base ring member 11 . That is, the line segment of the tip line 214 of each fixed blade 114 in the corresponding fixed blade 114 row on the meridian projection plane is inclined in the radial direction of the base ring member 11, reducing the flow separation loss and improving the pressing effect. do.

In this embodiment, when the diffuser 10 includes a plurality of rows of stationary blades 114 , of which the leading edge 214 of each stationary blade 114 in one row of stationary blades 114 is the base ring member 11 . ) is inclined with respect to the radial plane of the Of course, the tip line 214 of each fixed blade 114 in the plurality of fixed blade 114 rows may be configured to be inclined with respect to the radial surface of the base ring member 11 . In addition, the tip line 214 of each stationary blade 114 in each row of stationary blades 114 may be configured to be inclined with respect to the radial surface of the base ring member 11 .

In this embodiment, referring to FIG. 13 , in the second row of fixed blades 13 , between the leading edge 214 of each fixed blade 114 and the radial surface of the base ring member 11 . The absolute value of the inclination angle B1 is 25 degrees or less. The absolute value of the inclination angle B1 between the tip line 214 of each fixed blade 114 in the second row of fixed blades 13 and the radial face of the base ring member 11 is set to 25 degrees or less, , the flow separation loss is more sufficiently reduced, and the pressing effect is improved.

In this embodiment, with reference to FIG. 13 , in the second row of fixed blades 13 , each fixed blade 114 is configured to be inclined in the direction of the tail of the fixed blade 114 from the tip line 214 , the blade It further adjusts the flow separation in the vicinity of the root 17, reduces the flow separation loss, and improves the compression effect.

In the present embodiment, in at least one row of fixed blades 114 , the trailing edge 215 of each fixed blade 114 is configured to be inclined with respect to the radial surface of the base ring member 11 . That is, the line segment on the meridian projection surface of the trailing end line 215 of each fixed blade 114 in the corresponding fixed blade 114 row is inclined in the radial direction of the base ring member 11, and the airflow at the outlet portion of the fixed blade 114 It reduces the flow non-uniformity and improves the pressing effect.

In the present embodiment, when the diffuser 10 includes a plurality of rows of fixed blades 114 , the rear end 215 of each fixed blade 114 in one row of the fixed blades 114 is the base ring member 11 . ) is inclined with respect to the radial plane of the Of course, the rear end line 215 of each fixed blade 114 in the plurality of fixed blade 114 rows may be configured to be inclined with respect to the radial surface of the base ring member 11 . In addition, the trailing end line 215 of each stationary blade 114 in each row of stationary blades 114 may be configured to be inclined with respect to the radial surface of the base ring member 11 .

In this embodiment, referring to FIG. 13 , in the second row of fixed blades 13 , between the trailing end line 215 of each fixed blade 114 and the radial surface of the base ring member 11 . The absolute value of the inclination angle B2 is 30 degrees or less. The absolute value of the inclination angle B2 between the trailing edge 215 of each fixed blade 114 in the second row of fixed blades 13 and the radial face of the base ring member 11 is set to 30 degrees or less, , the fixed blade 114 more sufficiently improves the uniformity of the airflow flow at the outlet portion, and the pressing effect is improved.

In this embodiment, the diffuser 10 further includes a housing (not shown), the base ring member 11 is configured inside the housing, and each fixed blade 114 is disposed between the base ring member 11 and the housing. is located In addition to serving to protect each fixed blade 114 by constituting the housing, a flow path is formed between the base ring member 11 and the housing to more sufficiently limit the passage through which the air flow flows, and the diffuser 10 can ensure consistency in use in different blower devices.

In this embodiment, an area of at least 80% of the area of the top surface of each stationary blade 114 is in contact with the inner surface of the housing, ie, at least 80% of the area of the blade tip 16 of each stationary blade 114 . The region is in contact with the inner surface of the housing to more fully define the flow path 15 through which the airflow passes through each of the stationary blades 114, the base ring member 11 and the housing, thereby more fully guiding the airflow flow; Enhances the compression effect.

In this embodiment, the housing, the base ring member 11 and each fixed blade 114 are integrally formed to ensure a good connection between the housing and each fixed blade 114 and at the same time, the strength of the corresponding diffuser 10 to increase

In this embodiment, the housing may be manufactured separately, and the base ring member 11 having the fixed blade 114 may be configured inside the housing.

Through the diffuser 10 in this embodiment, it is possible to improve the vortex flow of the flow path 15 well, reduce the separation loss and energy loss, improve the pressure-increasing effect, and also reduce the airflow flow noise; In the case of the blower using the diffuser 10 of this embodiment, not only can a relatively large suction force be generated, but also the operation noise is relatively small. The diffuser 10 of the present embodiment may be applied not only to a blower, but also to household appliances such as dust collection equipment, a range hood, and a hair dryer.

Referring to FIG. 15 , the present embodiment further provides a blowing device 20 , wherein the blowing device 20 includes a frame 221 , an impeller 31 , a wind cover 32 , a motor 222 , and any of the above. comprising the diffuser 10 described in the embodiment of; The diffuser 10 is installed on the frame 221 , the impeller 31 is configured at the front end of the diffuser 10 , the wind cover 32 covers the impeller 31 , and the wind cover 32 is the frame Mounted on the 221 , the motor 222 is mounted inside the frame 221 , and the motor 222 is connected to the impeller 31 . By using the diffuser 10 of the above-described embodiment, the blower 20 may reduce energy loss and reduce operating noise, thereby generating greater suction power under the same power supply.

In this embodiment, referring to FIG. 15 , a bearing 225 is installed on the base ring member 11 , and the drive shaft 224 of the motor 222 passes through the bearing 225 and is connected to the impeller 31 . , the motor 222 drives the rotation of the impeller 31 more smoothly.

In this embodiment, referring to Fig. 15, the impeller 31 is a closed centrifugal impeller 31a. In this embodiment, the impeller 31 may be an open centrifugal impeller. In this embodiment, referring to FIG. 11 , the impeller 31 may be a mixed flow impeller 31b.

In this embodiment, referring to FIG. 16 , the wind cover 32 may extend to the tail portion of the diffuser 10 , that is, the wind cover 32 covers the impeller 31 and the diffuser 10 at the same time. , it is possible to better guide the airflow at the outlet of the impeller 31 to the diffuser 10 .

In this embodiment, the frame 221 is integrally formed with the wind cover 32 to ensure the strength of the connection between the frame 221 and the wind cover 32 .

The blower 20 described in this embodiment may also be applied to household appliances such as a vacuum cleaner, a range hood, a hair dryer, and a fan.

In this embodiment, the dust collection equipment including the blower 20 described in any of the above embodiments is further disclosed. The dust collecting equipment described in this embodiment uses the above-described blower 20 to ensure high output and high efficiency, as well as low noise.

Example 3:

This embodiment includes the following different parts compared to Embodiment 2: With reference to FIGS. 6, 9 and 10 , in a row of multiple stationary blades 114 , each in at least one row of stationary blades 114 . The profile 18 of the fixed blade 114 is configured to be inclined to one side of the fixed blade 114 . The profile 18 of the fixed blade 114 is inclined to one side of the fixed blade 114 , that is, the height direction of the profile 18 of the fixed blade 114 is the radius of the base ring member 11 . It is configured to be inclined in the direction, and when the airflow leaves the fixed blades 114, it effectively improves the boundary layer separation, reduces the separation loss, improves the vortex generated in the flow path 15 between the fixed blades 114, and further, The flow loss is reduced, and the energy loss of the airflow and the noise associated with the airflow flow are reduced.

In this embodiment, the profile 18a of each stationary blade 114 in the first row of stationary blades 12 may be configured to be inclined, so that when the airflow passes through the stationary blades 12 in the first row, the absolute velocity of the airflow is reduced. while reducing, the separation loss is reduced, and the pressure-increasing effect is improved.

In this embodiment, referring to FIGS. 6 and 8 , the profile 18b of each stationary blade 114 in the second stationary blade 13 may be configured to be inclined, so that the airflow is directed to the stationary blade 13 in the second row. ), while reducing the absolute velocity of the airflow, the separation loss is reduced, and the pressure-increasing effect is improved.

In this embodiment, both the profile 18 of each stationary blade 114 in the first stationary blade 12 and each stationary blade 114 in the second stationary blade 13 can be configured to be inclined, so that the airflow It can reduce the velocity and separation loss more sufficiently, reduce the non-uniformity of the airflow, and improve the pressure-increasing effect.

In this embodiment, when the diffuser 10 includes a plurality of rows of stationary blades 114, among them, the profile 18 of each stationary blade 114 in one row of stationary blades 114 may be configured to be inclined. . Of course, the profile 18 of each stationary blade 114 in the plurality of rows of stationary blades 114 among them may be configured to be inclined. Also, the profile 18 of each stationary blade 114 in each row of stationary blades 114 may be configured to be inclined.

In this embodiment, in each fixed blade 114 in which the profile 18 is configured to be inclined, the profile 18 of the fixed blade 114 is inclined to one side of the suction surface 19 facing the fixed blade 114 . is composed The boundary layer separation of the airflow can be better improved, the vortex generated in the flow path 15 between the stationary blades 114 is improved, and the energy loss and noise caused by the airflow flow are reduced.

In this embodiment, when the profile 18 of each stationary blade 114 in the stationary blade 12 of the first row is configured to be inclined, The profile 18 is configured to be inclined on one side of the suction surface 19 towards the corresponding fixed blade 114 .

In this embodiment, with reference to FIGS. 6 and 9 , when the profile 18b of each fixed blade 114 in the second row of fixed blades 13 is configured to be inclined, the second row of fixed blades 13 The profile 18b of each stationary blade 114 in , is configured to be inclined on one side of the suction surface 19 towards the corresponding stationary blade 114 .

In this embodiment, in each fixed blade 114 in which the profile 18 is configured to be inclined, the profile 18 of the fixed blade 114 is inclined to one side of the pressure surface 14 facing the fixed blade 114 . is composed The non-uniformity of the airflow can be better improved, the vortex generated in the flow path 15 between the stationary blades 114 is improved, and the energy loss and noise caused by the airflow flow are reduced.

In this embodiment, when the profile 18a of each stationary blade 114 in the stationary blade 12 of the first row is configured to be inclined, The profile 18a is configured to be inclined on one side of the pressure surface 14a towards the corresponding fixed blade 114 .

In this embodiment, referring to FIGS. 6 and 9 , when the profile 18b of each fixed blade 114 in the second row of fixed blades 13 is set to be inclined, the fixed blade 13 of the second row The profile 18 of each stationary blade 114 is inclined on one side of the pressure surface 14b towards the stationary blade 114 in question.

The foregoing is only a preferred embodiment of the present invention and is not intended to limit the present invention, and all modifications, equivalent replacements and improvements made without departing from the gist and principle of the present invention should be included in the protection scope of the present invention. do.

10 - diffuser; 11 - base ring member;
12—the first row of fixed blades;
13—Second row of fixed blades; 14 - pressure side; 15 - euros;
16— blade tip; 17 - Blade Root; 18—profile;
19 - suction side; 20 — blower;
21 - wind cover;
22 - drive mechanism; 23 - moving impeller; 24 - air inlet;
111 - foreign exchange wall; 112—Environment-resistant wall; 113 - mounting hole;
114 - fixed blade; 221 - frame; 222 - motor;
223 - circuit board; 224 - drive shaft; 225— Bearings.

Claims (58)

A diffuser comprising a base ring member and a plurality of stationary blade rows, the diffuser comprising:
The fixed blades in each row are sequentially configured on the foreign exchange wall of the base ring member along the axial direction of the base ring member, arranged along the circumferential direction of the base ring member, the base ring member in the axial direction to constitute an air inlet side and an outlet side respectively on the relative opposite sides of the base ring member along, from the inlet side to the outlet side, the length of the chord of one row of fixed blades is greater than or equal to the length of the chord of the next adjacent row of fixed blades, ;
wherein the fixed blades have a mounting angle, and from the air inlet side to the air outlet side, the mounting angle of the one row of stationary blades is less than or equal to the mounting angle of the next row of stationary blades. According to claim 1,
the head portion of the fixed blade has an inlet mounting angle, from the air inlet side to the air outlet side, the inlet mounting angle of one row of fixed blades being less than or equal to the inlet mounting angle of the stationary blades of the adjacent next row Features a diffuser. 3. The method of claim 2,
the tail portion of the fixed blade has an outlet mounting angle, from the air inlet side to the air outlet side, the outlet mounting angle of one row of fixed blades is less than or equal to the outlet mounting angle of the fixed blades of the next adjacent row Features a diffuser. 4. The method of claim 3,
from the air inlet side to the air outlet side, the outlet mounting angle of one row of fixed blades is less than or equal to the inlet mounting angle of the fixed blades of an adjacent next row; Alternatively, the outlet mounting angle of one row of the fixed blades is configured to be greater than or equal to the inlet mounting angle of the fixed blades of the next adjacent row. 5. The method of claim 4,
The diffuser includes a first row of stationary blades and a second row of stationary blades, wherein the first row of stationary blades and the second row of stationary blades are arranged in an axial direction of the base ring member from the air inlet side toward the air outlet side Diffuser, characterized in that sequentially configured on the foreign exchange wall of the base ring member along the. 6. The method of claim 5,
The diffuser, characterized in that the value of the inlet mounting angle of the fixed blades in the first row is 5° to 20°, and the value of the inlet mounting angle of the fixed blades in the second row is 20° to 40°. 6. The method of claim 5,
The diffuser, characterized in that the value of the exit mounting angle of the fixed blades in the first row is 10° to 60°, and the value of the exit mounting angle of the fixed blades in the second row is 60° to 80°. 6. The method of claim 5,
The diffuser, characterized in that the ratio of the length of the chords of the fixed blades of the first row to the length of the chords of the fixed blades of the second row is 1 to 5 or less. 6. The method of claim 5,
The number of blades of the fixed blades of the first row is equal to or less than the number of blades of the fixed blades of the second row, and the fixed blades of the first row and the fixed blades of the second row are uniformly distributed along the circumferential direction of the foreign exchange wall, respectively, and The fixed blades of the first row and the fixed blades of the second row are displaced from each other along the axial direction of the foreign exchange wall, and the head or tail of at least one of the fixed blades of the first row and the second row are fixed A diffuser, characterized in that a head portion or a tail portion of one of the fixed blades is aligned in the axial direction of the foreign exchange wall. 10. The method of claim 9,
Diffuser, characterized in that the number of blades of the fixed blades in the first row is 6-20, and the number of blades of the fixed blades in the second row is 10-30. 6. The method of claim 5,
The diffuser according to claim 1, wherein a distance along the axial direction of the base ring member between the head of the fixed blades in the first row and the tail of the fixed blades in the second row is 3 mm or less. 12. The method according to any one of claims 3 to 11,
The outlet mounting angle includes a first outlet mounting angle located at a blade root portion of the fixed blade and a second outlet mounting angle located at a blade tip portion of the fixed blade, the first outlet mounting angle and the second outlet mounting angle Diffuser, characterized in that the difference in the value of the angle is 0° to 20°. According to claim 1,
The fixed blade is a diffuser, characterized in that the arc-shaped blade. A diffuser comprising a base ring member and a plurality of fixed blades,
The plurality of fixed blades are sequentially configured in a plurality of rows along the axial direction of the base ring member, the number of the fixed blades in each fixed blade is plural, and in each fixed blade row, the plurality of fixed blades is the base ring member. configured along a circumferential direction, wherein the cross-section of the base ring member is circular; The diffuser according to claim 1, wherein the thickness of each fixed blade in at least one fixed blade row in the plurality of stationary blade rows is not constant from the head portion to the tail portion. 15. The method of claim 14,
In each of the fixed blades having a non-uniform thickness, the thickness of each of the fixed blades gradually increases from the head portion to the tail portion of the fixed blade and then gradually decreases again. 16. The method of claim 15,
In each of the fixed blades having a non-uniform thickness, the length of the chord at the location where the thickness of each of the fixed blades is maximum is 30% to 45% of the length of the chord of the fixed blade. 15. The method of claim 14,
The thickness corresponding to each point on the midline of each fixed blade of the second fixed blade is,
The thickness range of each fixed blade head is 0.1-0.8mm;
The thickness of each stationary blade location chord length of 40% of the chord length of the stationary blade is 1.1-1.4mm;
The diffuser, characterized in that the thickness range of each fixed blade tail portion satisfies the relationship of 0.1-1mm. 15. The method of claim 14,
For the second row of stationary blades, the thickness corresponding to each point on the midline of each stationary blade is calculated by the formula:
T2≤Hb≤T1;
T1=0.82+0.68L1b-0.17L1b ² +0.011L1b ³ ;
T2=0.68L1b-0.17L1b ² +0.011L1b ³ ;
where L1b is the distance from the corresponding point on the midline of the stationary blade to the head of the stationary blade, L1b ² is the square of L1b, L1b ³ is the cube of L1b, and T1 is on the midline of the stationary blade. Diffuser, characterized in that the maximum thickness relational expression of the corresponding point portion, and T2 is the minimum thickness relational expression of the corresponding point portion on the midline of the fixed blade. 19. The method of claim 18,
For the second row of stationary blades, the thickness corresponding to each point on the midline of each stationary blade is calculated by the formula:
A diffuser, characterized in that it satisfies Hb=0.32+0.68L1b-0.17L1b ² +0.011L1b ³ . 15. The method of claim 14,
In each of the fixed blades with non-uniform thickness, the thickness of the blade root and the blade tip corresponding to an arbitrary position on the midline of each fixed blade is H1 and H2, respectively, and H1 ≥ H2, characterized in that a diffuser. 21. The method of claim 20,
Diffuser, characterized in that 0≤H1-H2≤0.5mm. 15. The method of claim 14,
In at least one row of the stationary blades, a front end of each stationary blade is configured to be inclined with respect to a radial surface of the base ring member. 23. The method of claim 22,
In the second row of the stationary blades, the absolute value of the inclination angle between the leading edge of each stationary blade and the radial surface of the base ring member is 25 degrees or less. 15. The method of claim 14,
In at least one row of the fixed blades, a rear end line of each of the fixed blades is configured to be inclined with respect to a radial surface of the base ring member. 24. The method of claim 23,
In the second row of the stationary blades, the absolute value of the inclination angle between the leading edge of each stationary blade and the radial surface of the base ring member is 30 degrees or less. 15. The method of claim 14,
In the two rows of fixed blades adjacent to each other, the chord length of each stationary blade in one row of previous stationary blades is greater than or equal to the length of the chords of each stationary blade in one row of next stationary blades. . 15. The method of claim 14,
In the two rows of fixed blades adjacent to each other, the number of stationary blades in the next row of stationary blades is equivalent to 1.5 to 3 times the number of stationary blades in the row of previous stationary blades. 15. The method of claim 14,
In the two rows of fixed blades adjacent to each other, the lap angle of each stationary blade in a previous row of stationary blades is greater than or equal to the wrap angle of each stationary blade in a row of next stationary blades. 15. The method of claim 14,
wherein in said two rows of said stationary blades adjacent to each other, the tail portion of each stationary blade in one row of said stationary blades is adapted to match the head portion of the corresponding stationary blade in the next adjacent row. 15. The method of claim 14,
In the two rows of fixed blades adjacent to each other, the angle of the head portion away from the corresponding next fixed blade row adjacent along the circumferential direction of the base ring member is 20 degrees Diffuser, characterized in that the following. 15. The method of claim 14,
The diffuser, characterized in that the mounting angle of each part on each fixed blade is set to gradually increase from the head portion to the tail portion of the fixed blade. 15. The method of claim 14,
The mounting angle of the inlet of each fixed blade has a variation width along the radial direction of the base ring member of 10 degrees or less, and the inlet mounting angle of the blade root portion of each fixed blade is the inlet mounting angle of the blade tip portion of the corresponding fixed blade. A diffuser, characterized in that it is set to be greater than or equal to. 15. The method of claim 14,
The diffuser further comprises a housing, wherein the base ring member is configured inside the housing, and each of the stationary blades is positioned between the base ring member and the housing. 34. The method of claim 33,
and an area of at least 80% of the upper surface of each stationary blade is in contact with the inner surface of the housing. A diffuser comprising a base ring member and a plurality of fixed blades,
The plurality of stationary blades are sequentially configured in a plurality of rows along the axial direction of the base ring member, and in each stationary blade row, the plurality of stationary blades are configured along the circumferential direction of the base ring member, and the cross section of the base ring member is represents a circle; The diffuser according to claim 1, wherein the profile of each fixed blade in at least one fixed blade row in the plurality of stationary blade rows is configured to be inclined toward one side of the fixed blade row. 36. The method of claim 35,
In each of the fixed blades having an inclined profile, the profile of the fixed blade is configured to be inclined on one side of the suction surface facing the fixed blade. 37. The method of claim 36,
The diffuser, characterized in that the inclination angle of the tail portion profile of each fixed blade is greater than or equal to the inclination angle of the head portion profile of the fixed blade. 36. The method of claim 35,
The diffuser, characterized in that the profile of the fixed blades in the second row is configured to be inclined on one side of the suction surface toward the fixed blade. 39. The method of claim 38,
In the second row of fixed blades, the inclination angle of the head portion profile of each fixed blade is Q1, the inclination angle of the tail portion profile of each fixed blade is Q2, the value of Q1 ranges from 0 degrees to 30 degrees, Q2 The value range of the diffuser, characterized in that 0 to 40 degrees. 36. The method of claim 35,
In each of the fixed blades having an inclined profile, the profile of the fixed blade is configured to be inclined on one side of the pressure surface facing the fixed blade. 36. The method of claim 35,
In each of the fixed blades having an inclined profile, the inclination angle of the profile of each fixed blade is set to gradually increase from the head portion to the tail portion of the fixed blade. 36. The method of claim 35,
In at least one row of the stationary blades, a front end of each stationary blade is configured to be inclined with respect to a radial surface of the base ring member. 43. The method of claim 42,
In the second row of the stationary blades, the absolute value of the inclination angle between the leading edge of each stationary blade and the radial surface of the base ring member is 25 degrees or less. 36. The method of claim 35,
In at least one row of the fixed blades, a rear end line of each of the fixed blades is configured to be inclined with respect to a radial surface of the base ring member. 45. The method of claim 44,
In the second row of the stationary blades, the absolute value of the inclination angle between the leading edge of each stationary blade and the radial surface of the base ring member is 30 degrees or less. 36. The method of claim 35,
In the two rows of fixed blades adjacent to each other, the chord length of each stationary blade in one row of previous stationary blades is greater than or equal to the length of the chords of each stationary blade in one row of next stationary blades. . 36. The method of claim 35,
In the two rows of fixed blades adjacent to each other, the number of stationary blades in the next row of stationary blades is equivalent to 1.5 to 3 times the number of stationary blades in the row of previous stationary blades. 36. The method of claim 35,
In the two rows of fixed blades adjacent to each other, the lap angle of each stationary blade in a previous row of stationary blades is greater than or equal to the wrap angle of each stationary blade in a row of next stationary blades. 36. The method of claim 35,
wherein in said two rows of said stationary blades adjacent to each other, the tail portion of each stationary blade in one row of said stationary blades is adapted to match the head portion of the corresponding stationary blade in the next adjacent row. 36. The method of claim 35,
In the two rows of fixed blades adjacent to each other, the angle of the head portion away from the corresponding next fixed blade row adjacent along the circumferential direction of the base ring member is 20 degrees Diffuser, characterized in that the following. 36. The method of claim 35,
The diffuser, characterized in that the mounting angle of each part on each fixed blade is set to gradually increase from the head portion to the tail portion of the fixed blade. 36. The method of claim 35,
The mounting angle of the inlet of each fixed blade has a variation width along the radial direction of the base ring member of 10 degrees or less, and the inlet mounting angle of the blade root portion of each fixed blade is the inlet mounting angle of the blade tip portion of the corresponding fixed blade. Diffuser, characterized in that set above. 36. The method of claim 35,
In the second row of the fixed blades, the diffuser, characterized in that the inlet mounting angle range of each of the fixed blades is 20 to 60 degrees. 36. The method of claim 35,
In the second row of the fixed blades, the diffuser, characterized in that the outlet mounting angle range of each of the fixed blades is 50 degrees to 90 degrees. 36. The method of claim 35,
The diffuser further comprises a housing, wherein the base ring member is configured inside the housing, and each of the stationary blades is positioned between the base ring member and the housing. 56. The method of claim 55,
and an area of at least 80% of the upper surface of each stationary blade is in contact with the inner surface of the housing. A blower device comprising the diffuser according to any one of claims 1, 14 or 35. A dust collection equipment comprising the blower according to claim 57.

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